US5127754A - Writing instrument's cap with safety vent - Google Patents

Writing instrument's cap with safety vent Download PDF

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Publication number
US5127754A
US5127754A US07/753,768 US75376891A US5127754A US 5127754 A US5127754 A US 5127754A US 75376891 A US75376891 A US 75376891A US 5127754 A US5127754 A US 5127754A
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US
United States
Prior art keywords
cap
writing instrument
main cylinder
inner cylinder
cup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/753,768
Inventor
Kimihiko Mase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilot Ink Co Ltd
Original Assignee
Pilot Ink Co Ltd
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Filing date
Publication date
Application filed by Pilot Ink Co Ltd filed Critical Pilot Ink Co Ltd
Assigned to PILOT INK CO., LTD., THE reassignment PILOT INK CO., LTD., THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MASE, KIMIHIKO
Application granted granted Critical
Publication of US5127754A publication Critical patent/US5127754A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/08—Protecting means, e.g. caps
    • B43K23/12—Protecting means, e.g. caps for pens
    • B43K23/122—Protecting means, e.g. caps for pens with means for preventing choking
    • B43K23/124—Protecting means, e.g. caps for pens with means for preventing choking comprising an air passage

Definitions

  • This invention relates to the caps of writing instruments more particularly it relates to the cap of a writing instrument (hereinafter referred to as "a writing instrument's cap", when applicable) which has a vent structure for preventing suffocation of an infant if the cap of a writing instrument is swallowed by accident.
  • a writing instrument's cap when applicable
  • a writing instrument's cap having such vent has been disclosed in the art (cf. DT Patent No. 3821195, U.S. Pat. No. 4,969,766, and UK Patent Laid-Open No. 2215279).
  • the cap is of a dual structure having a main cylinder and an inner cylinder. A gap is formed in the junction of the main cylinder and the inner cylinder to establish communication between the interior of the cap and the ambient atmosphere.
  • an object of this invention is to provide a writing instrument's cap with a vent structure which can be readily formed irrespective of the material of the main cylinder.
  • a writing instrument's cap 1 comprises: a main cylinder 2 and an inner cylinder 3.
  • the inner cylinder 3 is molded from a plastic material.
  • the inner cylinder 3 is made up of a cup-shaped upper portion 31 with a bottom 36, which includes an annular flange 32 at the upper end, and a large diameter portion 33 below the annular flange 32.
  • the outside diameter of the inner cylinder is equal to or slightly larger than the inside diameter of the main cylinder 2 and is larger than the outside diameter of the remaining portion of the inner cylinder.
  • a cylindrical lower portion extends from the bottom 36 of the cup-shaped upper portion in such a manner that it is opened at the outer end.
  • the inner cylinder is fixed in the main cylinder with the flange 32 locked to the upper end face of the main cylinder 2.
  • At least one opening 34 is formed in the wall of the cup-shaped upper portion 31 to provide communication between the interior of the cap and ambient air.
  • the inner cylinder 3 is fixed to the main cylinder 2 with its large diameter portion 33 press-fitted in the main cylinder 2, in such a manner that a gap is formed between the inner wall of the main cylinder's lower portion and the outer wall of the inner cylinder 3.
  • the dimension, the number, and the configuration of the above-described opening 34 is suitably determined from the size and configuration of the inner cylinder so that the quantity of airflow is at least 8 liters/minute with a maximum pressure difference of 1.33 kPa (British Standard 7272:1990).
  • a clip 21 is connected to the cap, or it is formed integral with the cap.
  • the pen point portion of the latter 4 is hermetically held in the lower portion (or the cylindrical lower portion) of the inner cylinder 3.
  • the infant will not be suffocated thereby, because, as was described above, the interior of the cap is communicated with the outside air through the opening 34 formed in the wall of the cup-shaped upper portion of the inner cylinder, and the opening 34 is not brought into direct contact with the surface of the windpipe. That is, it is never closed by the surface of the windpipe. In other words, the infant is prevented from being suffocated by the cap caught at the windpipe, because he can still inhale and exhale through the cap.
  • FIG. 1 is a longitudinal sectional view of an example of a writing instrument's cap according to the invention
  • FIG. 2 is a sectional view taken along line A--A in FIG. 1;
  • FIG. 3 is an explanatory diagram showing the writing instrument's cap put on the writing instrument.
  • a writing instrument's cap 1 of the invention comprises: a main cylinder 2; and an inner cylinder 3 fitted in the former 2.
  • the inner cylinder 3 is made up of an upper portion, namely, a cup-shaped portion 31, and a lower portion, namely, a cylindrical portion 35 extended from the cup-shaped portion 31.
  • the cup-shaped portion 31 has an annular flange 32 at the outer end.
  • the body of the cup-shaped portion 31 is increased in outside diameter below the annular flange 32, thus forming a large diameter portion 33.
  • the inner cylinder 3 is fixed in one end portion of the main cylinder 2.
  • the main cylinder 2 has an annular protrusion extending radially inwardly from its inner wall. With the annular protrusion, the inner cylinder 3 is positively engaged with the main cylinder 2.
  • Two circular openings 34 3 mm in diameter are formed in the wall of the cup-shaped portion 31 in such a manner that they are diametrically opposite to each other, so as to establish communication between the interior of the cap and the ambient air.
  • the cup-shaped portion 31 has a bottom 36.
  • the cylindrical portion 35 is extended from the bottom 36. That is, one end of the cylindrical portion 35 is closed with the bottom 36, and the other end is opened.
  • the cylindrical portion 35 is hermetically sealed therewith.
  • the outside diameter of the lower portion of the inner cylinder 3, which extends from the large diameter portion 33, is smaller than the inside diameter of the main cylinder 2, so that, when the inner cylinder 3 is fitted in the main cylinder 2, a gap is formed between the inner cylinder 3 and the main cylinder 2.
  • the gap is a vent to communicate the interior of the cap with the openings 34.
  • the arrows indicate the air flow when the writing instrument's cap 1 is caught in a windpipe. It goes without saying that air may flow in the opposite direction.
  • the essential function of the writing instrument's cap is to hermetically hold the pen point portion of the writing instrument. This function is maintained by the lower portion (i.e., the cylindrical portion) of the inner cylinder. Since the upper portion (i.e., the cup-shaped portion) of the inner cylinder has the openings in its side wall, the interior of the cap communicates with the ambient air at all times. Even if the writing instrument's cap swallowed by an infant by accident is caught in the windpipe, the infant will never be suffocated thereby because the openings formed in the wall of the inner cylinder are not brought into direct contact with the surface of the windpipe.
  • the main cylinder is in the form of a pipe, which can be manufactured with ease irrespective of its material.
  • the writing instrument's cap with the vent means is formed.

Abstract

A writing instrument's cap includes a main cylinder; and an inner cylinder fixedly fitted in the main cylinder includes: a cup-shpaed upper portion having a bottom, an annular flange provided to an upper end thereof, and a large diameter portion provided below the annular flange; and a cylindrical lower portion extended from the bottom of the cup-shaped upper portion in such a manner that the cylindrical lower portion is opened at the other end, wherein a vent member for communicating an interior of the cap with an outside air is provided to a wall of the cup-shaped upper portion.

Description

BACKGROUND OF THE INVENTION
This invention relates to the caps of writing instruments more particularly it relates to the cap of a writing instrument (hereinafter referred to as "a writing instrument's cap", when applicable) which has a vent structure for preventing suffocation of an infant if the cap of a writing instrument is swallowed by accident.
A writing instrument's cap having such vent has been disclosed in the art (cf. DT Patent No. 3821195, U.S. Pat. No. 4,969,766, and UK Patent Laid-Open No. 2215279). The cap is of a dual structure having a main cylinder and an inner cylinder. A gap is formed in the junction of the main cylinder and the inner cylinder to establish communication between the interior of the cap and the ambient atmosphere.
However, a writing instrument's cap having a vent structure in its inner cylinder has not been disclosed yet.
In the above-described conventional writing instrument's cap, it is difficult to form the main cylinder of metal or wood.
SUMMARY OF THE INVENTION
Accordingly, an object of this invention is to provide a writing instrument's cap with a vent structure which can be readily formed irrespective of the material of the main cylinder.
A writing instrument's cap 1 according to the invention comprises: a main cylinder 2 and an inner cylinder 3. In the writing instrument's cap, the inner cylinder 3 is molded from a plastic material. The inner cylinder 3 is made up of a cup-shaped upper portion 31 with a bottom 36, which includes an annular flange 32 at the upper end, and a large diameter portion 33 below the annular flange 32. The outside diameter of the inner cylinder is equal to or slightly larger than the inside diameter of the main cylinder 2 and is larger than the outside diameter of the remaining portion of the inner cylinder. A cylindrical lower portion extends from the bottom 36 of the cup-shaped upper portion in such a manner that it is opened at the outer end. The inner cylinder is fixed in the main cylinder with the flange 32 locked to the upper end face of the main cylinder 2. At least one opening 34 is formed in the wall of the cup-shaped upper portion 31 to provide communication between the interior of the cap and ambient air.
In the writing instrument's cap thus constructed, the inner cylinder 3 is fixed to the main cylinder 2 with its large diameter portion 33 press-fitted in the main cylinder 2, in such a manner that a gap is formed between the inner wall of the main cylinder's lower portion and the outer wall of the inner cylinder 3.
The dimension, the number, and the configuration of the above-described opening 34 is suitably determined from the size and configuration of the inner cylinder so that the quantity of airflow is at least 8 liters/minute with a maximum pressure difference of 1.33 kPa (British Standard 7272:1990).
When necessary, a clip 21 is connected to the cap, or it is formed integral with the cap.
When the cap 1 is placed on the writing instrument 4, the pen point portion of the latter 4 is hermetically held in the lower portion (or the cylindrical lower portion) of the inner cylinder 3. Even in the case where the cap 1 is caught at the windpipe of an infant having been swallowed by accident, the infant will not be suffocated thereby, because, as was described above, the interior of the cap is communicated with the outside air through the opening 34 formed in the wall of the cup-shaped upper portion of the inner cylinder, and the opening 34 is not brought into direct contact with the surface of the windpipe. That is, it is never closed by the surface of the windpipe. In other words, the infant is prevented from being suffocated by the cap caught at the windpipe, because he can still inhale and exhale through the cap.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal sectional view of an example of a writing instrument's cap according to the invention;
FIG. 2 is a sectional view taken along line A--A in FIG. 1; and
FIG. 3 is an explanatory diagram showing the writing instrument's cap put on the writing instrument.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
One preferred embodiment of this invention will be described with reference to the accompanying drawings (FIGS. 1 through 3).
As shown in FIGS. 1 through 3, a writing instrument's cap 1 of the invention comprises: a main cylinder 2; and an inner cylinder 3 fitted in the former 2.
The inner cylinder 3 is made up of an upper portion, namely, a cup-shaped portion 31, and a lower portion, namely, a cylindrical portion 35 extended from the cup-shaped portion 31. The cup-shaped portion 31 has an annular flange 32 at the outer end. The body of the cup-shaped portion 31 is increased in outside diameter below the annular flange 32, thus forming a large diameter portion 33. The inner cylinder 3 is fixed in one end portion of the main cylinder 2. The main cylinder 2 has an annular protrusion extending radially inwardly from its inner wall. With the annular protrusion, the inner cylinder 3 is positively engaged with the main cylinder 2. Two circular openings 34 3 mm in diameter are formed in the wall of the cup-shaped portion 31 in such a manner that they are diametrically opposite to each other, so as to establish communication between the interior of the cap and the ambient air.
The cup-shaped portion 31 has a bottom 36. The cylindrical portion 35 is extended from the bottom 36. That is, one end of the cylindrical portion 35 is closed with the bottom 36, and the other end is opened. When the pen point portion 41 of a writing instrument 4 is inserted into the cap 1, the cylindrical portion 35 is hermetically sealed therewith.
The outside diameter of the lower portion of the inner cylinder 3, which extends from the large diameter portion 33, is smaller than the inside diameter of the main cylinder 2, so that, when the inner cylinder 3 is fitted in the main cylinder 2, a gap is formed between the inner cylinder 3 and the main cylinder 2. The gap is a vent to communicate the interior of the cap with the openings 34.
In FIG. 2, the arrows indicate the air flow when the writing instrument's cap 1 is caught in a windpipe. It goes without saying that air may flow in the opposite direction.
The essential function of the writing instrument's cap is to hermetically hold the pen point portion of the writing instrument. This function is maintained by the lower portion (i.e., the cylindrical portion) of the inner cylinder. Since the upper portion (i.e., the cup-shaped portion) of the inner cylinder has the openings in its side wall, the interior of the cap communicates with the ambient air at all times. Even if the writing instrument's cap swallowed by an infant by accident is caught in the windpipe, the infant will never be suffocated thereby because the openings formed in the wall of the inner cylinder are not brought into direct contact with the surface of the windpipe.
The main cylinder is in the form of a pipe, which can be manufactured with ease irrespective of its material. By combining the main cylinder with the inner cylinder, the writing instrument's cap with the vent means is formed.

Claims (1)

What is claimed is:
1. A writing instrument's cap comprising:
a main cylinder; and
an inner cylinder molded from a plastic material and fixed in said main cylinder at one end, said inner cylinder comprising:
a cup-shaped upper portion including a bottom, an annular flange provided to an upper end thereof, and a large diameter portion provided below said annular flange, said inner cylinder being fixed in said main cylinder with said annular flange locked to the upper end face of said main cylinder and the remaining portion inserted into said main cylinder, wherein an outside diameter of said large diameter portion is equal to or slightly larger than an inside diameter of said main cylinder and is larger than an outside diameter of a remaining portion of said inner cylinder; and
a cylindrical lower portion extended from said bottom of said cup-shaped upper portion and opened at the other end, wherein at least one opening is provided to a circumferential wall below said large diameter portion of said cup-shaped upper portion, such that ventilation axially through an inner space of the cap is secured during removal of the cap from a writing instrument.
US07/753,768 1990-09-18 1991-09-03 Writing instrument's cap with safety vent Expired - Lifetime US5127754A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1990097788U JP2512727Y2 (en) 1990-09-18 1990-09-18 Writing instrument cap
JP2-97788[U] 1990-09-18

Publications (1)

Publication Number Publication Date
US5127754A true US5127754A (en) 1992-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US07/753,768 Expired - Lifetime US5127754A (en) 1990-09-18 1991-09-03 Writing instrument's cap with safety vent

Country Status (7)

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US (1) US5127754A (en)
JP (1) JP2512727Y2 (en)
CA (1) CA2051472C (en)
DE (1) DE9111419U1 (en)
FR (1) FR2666766B3 (en)
GB (1) GB2248586B (en)
IT (1) IT224060Z2 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570965A (en) * 1995-09-01 1996-11-05 C & J Jewelry Co., Inc. Writing instrument clip assembly
US5599127A (en) * 1991-11-13 1997-02-04 Bic Corporation Cap for writing and marking instruments
US5709493A (en) * 1993-03-18 1998-01-20 Mitsubishi Pencil Kabushiki Kaisha Ballpoint pen having a backflow preventing mechanism
US5897266A (en) * 1996-11-27 1999-04-27 The Gillette Company Vent system for writing instrument
US5927888A (en) * 1995-08-01 1999-07-27 Zebra Co., Ltd. Cap for writing instruments
US5927887A (en) * 1996-11-26 1999-07-27 Zebra Co., Ltd. Cap for a writing means
US5975783A (en) * 1998-08-19 1999-11-02 Pro Eton Corporation Pen cap with pressure relief means
EP1025971A1 (en) * 1999-02-03 2000-08-09 Universal S.p.A. Mould for writing instrument cap and respective cap
US6309127B1 (en) 1999-05-07 2001-10-30 Berol Corporation Caps for writing instruments
US20040064145A1 (en) * 2002-09-30 2004-04-01 Ball Robert J. Force specific impacting device
US20060263143A1 (en) * 2005-05-19 2006-11-23 Chinchen Tseng Multifunctional marking device
CN102365177A (en) * 2009-05-15 2012-02-29 思笔乐国际有限公司 Closure Cap
US20150183260A1 (en) * 2012-06-05 2015-07-02 Mitsubishi Pencil Company, Limited Cap for writing instrument and writing instrument
CN107042716A (en) * 2017-04-06 2017-08-15 嘉兴德力克斯科技有限公司 A kind of pen penholder for being difficult suck-back ink

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4423682A1 (en) * 1994-06-23 1996-01-11 Rotring Int Gmbh Writing or drawing implement with front part
US20150093175A1 (en) * 2013-10-02 2015-04-02 Dallas Lighthouse for the Blind Writing Instrument with Safety Cap

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312168A1 (en) * 1973-03-12 1974-09-19 Rudi Hutt FIBER PEN
US4018536A (en) * 1975-10-22 1977-04-19 Anson Incorporated Writing instrument top
DE2818477A1 (en) * 1978-04-27 1979-10-31 Hauser & Co A Fibre tip pen with fitted cartridge - is fitted in sectioned plastic housing with reversal cap to cover writing tip and has pressure equalisation openings
US4643605A (en) * 1983-11-28 1987-02-17 Iwasaki Kosei Device for preventing drying of nib of cartridge type pen
SU1391958A1 (en) * 1986-06-25 1988-04-30 Ярославский Завод "Оргтехника" Cap
GB2215279A (en) * 1988-02-29 1989-09-20 Dobell Spa Anti-asphyxiation caps for writing instruments
WO1989011978A1 (en) * 1988-05-31 1989-12-14 J.S. Staedtler Gmbh & Co. Cap for writing instruments
DE3821195A1 (en) * 1988-06-23 1989-12-28 Schwan Stabilo Schwanhaeusser PROTECTIVE CAP FOR A WRITING, SIGN OR APPLICATION DEVICE
GB2229967A (en) * 1989-03-30 1990-10-10 Gillette Co Safety pen cap
US4969766A (en) * 1989-02-15 1990-11-13 Binney & Smith, Inc. Cap for marking instruments
US5000604A (en) * 1989-10-03 1991-03-19 Mitsubishi Pencil Co., Ltd. Removable cap attached to a writing instrument
US5000603A (en) * 1989-06-15 1991-03-19 Mitsubishi Pencil Co., Ltd. Removable cap of writing instrument

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236509B (en) * 1989-10-04 1992-11-11 Mitsubishi Pencil Co A removable cap for a writing instrument

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312168A1 (en) * 1973-03-12 1974-09-19 Rudi Hutt FIBER PEN
US4018536A (en) * 1975-10-22 1977-04-19 Anson Incorporated Writing instrument top
DE2818477A1 (en) * 1978-04-27 1979-10-31 Hauser & Co A Fibre tip pen with fitted cartridge - is fitted in sectioned plastic housing with reversal cap to cover writing tip and has pressure equalisation openings
US4643605A (en) * 1983-11-28 1987-02-17 Iwasaki Kosei Device for preventing drying of nib of cartridge type pen
SU1391958A1 (en) * 1986-06-25 1988-04-30 Ярославский Завод "Оргтехника" Cap
GB2215279A (en) * 1988-02-29 1989-09-20 Dobell Spa Anti-asphyxiation caps for writing instruments
WO1989011978A1 (en) * 1988-05-31 1989-12-14 J.S. Staedtler Gmbh & Co. Cap for writing instruments
DE3821195A1 (en) * 1988-06-23 1989-12-28 Schwan Stabilo Schwanhaeusser PROTECTIVE CAP FOR A WRITING, SIGN OR APPLICATION DEVICE
US4969766A (en) * 1989-02-15 1990-11-13 Binney & Smith, Inc. Cap for marking instruments
GB2229967A (en) * 1989-03-30 1990-10-10 Gillette Co Safety pen cap
US5000603A (en) * 1989-06-15 1991-03-19 Mitsubishi Pencil Co., Ltd. Removable cap of writing instrument
US5000604A (en) * 1989-10-03 1991-03-19 Mitsubishi Pencil Co., Ltd. Removable cap attached to a writing instrument

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5599127A (en) * 1991-11-13 1997-02-04 Bic Corporation Cap for writing and marking instruments
US5709493A (en) * 1993-03-18 1998-01-20 Mitsubishi Pencil Kabushiki Kaisha Ballpoint pen having a backflow preventing mechanism
US5927888A (en) * 1995-08-01 1999-07-27 Zebra Co., Ltd. Cap for writing instruments
US5570965A (en) * 1995-09-01 1996-11-05 C & J Jewelry Co., Inc. Writing instrument clip assembly
US5927887A (en) * 1996-11-26 1999-07-27 Zebra Co., Ltd. Cap for a writing means
US5897266A (en) * 1996-11-27 1999-04-27 The Gillette Company Vent system for writing instrument
US5975783A (en) * 1998-08-19 1999-11-02 Pro Eton Corporation Pen cap with pressure relief means
EP1025971A1 (en) * 1999-02-03 2000-08-09 Universal S.p.A. Mould for writing instrument cap and respective cap
US6309127B1 (en) 1999-05-07 2001-10-30 Berol Corporation Caps for writing instruments
US20040064145A1 (en) * 2002-09-30 2004-04-01 Ball Robert J. Force specific impacting device
US7172598B2 (en) * 2002-09-30 2007-02-06 Depuy Products, Inc. Force specific impacting device
US20060263143A1 (en) * 2005-05-19 2006-11-23 Chinchen Tseng Multifunctional marking device
CN102365177A (en) * 2009-05-15 2012-02-29 思笔乐国际有限公司 Closure Cap
US20150183260A1 (en) * 2012-06-05 2015-07-02 Mitsubishi Pencil Company, Limited Cap for writing instrument and writing instrument
US9302530B2 (en) * 2012-06-05 2016-04-05 Mitsubishi Pencil Company, Limited Cap for writing instrument and writing instrument
CN107042716A (en) * 2017-04-06 2017-08-15 嘉兴德力克斯科技有限公司 A kind of pen penholder for being difficult suck-back ink
CN107042716B (en) * 2017-04-06 2018-12-14 嘉兴德力克斯科技有限公司 A kind of pen penholder being not easy suck-back ink

Also Published As

Publication number Publication date
CA2051472A1 (en) 1992-03-19
GB9119332D0 (en) 1991-10-23
ITRM910182U1 (en) 1993-03-16
ITRM910182V0 (en) 1991-09-16
FR2666766B3 (en) 1992-09-04
GB2248586A (en) 1992-04-15
FR2666766A3 (en) 1992-03-20
IT224060Z2 (en) 1995-11-23
JP2512727Y2 (en) 1996-10-02
GB2248586B (en) 1994-03-02
DE9111419U1 (en) 1991-12-05
CA2051472C (en) 1996-11-12
JPH0454889U (en) 1992-05-11

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